Bluetooth smartphone controller - scrolling rally roadbook reader up and down .

If you are displaying your roadbook as a PDF on a smartphone in, say Rally Roadbook Reader, you might have come across the problem of how to scroll the roadbook backwards or forwards while wearing gloves on the move…..?
Bluetooth remote control gadgets are the way to go.  You can see from the photos how I did it…. 
Having proved to myself that these devices work, and they successfully interface with smartphones, I’ve now bought some more to sell on. $40 each.   If you want one posting I can work out what the postage will be from Vancouver Island to you.
Comes with an onboard battery, charged via a usb charger.   Battery life is at least five long days out (I’ve only needed to charge my one once or twice since this time last year).
I’ll have some with me at Sayward Junction this weekend.